Electric cable



Feb. 23 1926.

C. L. LILLEBERG ELECTRIC CABLE Filed Dec. 7 1921 Patented Feb. 23, 1926.

UNITED STATES PATENT OFFICE.

cnuinns L. LILLEBERG, OF cnrcneo. ILLINOIS.

ELECTRIC cABLE.

Application filed December 7, 1921. Serial No. 520,512.

To all whom it may concern:

Be it known that I, CHARLES L. LILLEBERG, citizen of the United States,residing at Chicago, in the county of Cook and State provedconstruction, whereby the wires of the cable are accessible along thelength of the cable for circuit connection.

The cable of my invention is provided with an enclosing conduit formedwith lateral openings throughwhich wires of the cable are accessible forcircuit connection. This conduit is preferably stiff to be capable ofmaintaining its own shape, there being desirably also a stiffening corewithin the cable.

I will explain my invention more fully by reference to the accompanyingdrawing showing the preferred embodiment thereof and in which Fig. l isa front view of a timing switch equipped 'with the invention; Fig. 2 isa side view of the switch shown in Fig. l with the mounting therefor insection; Fig. 3is a somewhat diagrammatic view'of the portion of thecable that is to surround the timer casing, before such por .tion iscurled about the casing; Fig. 1 shows the metallic stiffening core andthe contiguous portion of the flexible conductor united therewith; Fig.5 is a perspective view of the adjacent ends of the core and conductorof Fig. 4: in separated relation; Fig. 6 is a perspective viewillustrating the structure as it appears in Fig. 1 with the timingswitch casing and the support for such casing removed; and Fig. 7 is asectional View on line 7-7 of Fig. 6.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The timing switch illustrated is provided with any suitable support 1 inwhich an engine driven shaft 2 is mounted to turn. This engine drivenshaft is suitably connected with a traveling contact 3 which may be inthe form of a roller suitably connected ,with one terminal of a sourceof current that is to be successively included in circuit with thecontacts of spark plugs'in the cylinders of a multiple cylinder internalcomhustion engine. The shaft 2 terminates within a timer casing 4 whichis rotatable upon support 1 and houses the contact 3 suit-- ablysupported upon the contiguous end of shaft 2. This timing switch casingsupports a plurality of contacts 5 equal in number to the number ofcylinders included in the engine equipped with the switch, in thisinstance four. The casing 4: is formed with the usual cavity thatreceivcs a similarly shaped portion formed in a retaining spring 8, allas is understood by those skilled in the art. The casing is turned by atiming lever 9 that is in the form of a rod having an end which passesthrough an ear 10 formed upon the casing. The conductors 11, eachindividual to and connected with a contact 5, are assembled into a cableand pass through a conduit 12 which partially surrounds the timingcasing, the conductors 11 terminating in or being connected withmetallic terminals 13, each conductor having such a terminal individualthereto. These terminals are clamped between the nuts 14 of bindingposts that are respectively individual to the contacts 5.

All of the conductors 11, except one, preferably are entirely formed oftinsel wire so as to be quite flexible. The conductor 11 which is notentirely formed of tinsel includes a stiff section 15 which ispreferably a brass rod in the nature of a core that will retain theshape imparted to it and the similar shape of the cable portion of whichit forms a part. 15 desirably has one end formed into a half sleeve 16as indicated in Fig. 5. The complemental tinsel portion of thecorresponding conductor 11 is received in this half The stiff conductorsection sleeve and is soldered, whereby the section 15 becomes anelectrical continuation of one of the conductors 11. The conduit portion12 is long enough to provide the part of the cable which surrounds thecasing with a stem 17 which extends a sufficient distance away from thecasing to permit of the attachment thereto of the flexible tube 18.

The conduit section 12 extends for a short distance within the tubing18, a sleeve 19 of rubber completing the joint between the two conduitsections and tending to prevent their separation. The stiffening core 15is desirably almost coextensive with the conduit section 12, extendingconsiderably into the bore of the sleeve 19, whereby the cable portion17 is also made stifi. By this construction that portion of thecablewhich is assembled with the timer casing is made rigid with res ectthereto, while the continuing part 0 the cable that is within the tubing1S is sufiiciently flexible. readily to permit of the spark advancingand receding adjustments of the timer casing.

In assembling the conductors within the conduit section 12, the threecompletely flexible wires 11 are first placed within the bore of theconduit section 12, whereafter the rigid section 15 of the remainingconductor 11 is easily forced into position. The stiff section of thecable may be brought to suitable sha e apart from the timer casing, theshape 0 this part of the cable being maintained by the stiifening core15 whether the cable is assembled with the timer switch casing or not.

While I have herein shown and articularly described the preferredembod1ment of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention, but

aving thus described my invention I claim as new and desire to secure byLetters Patent the following A cable provided with an enclosing conduithaving a portion formed with lateral openings distributed along the samethrough which wires of the cable are accessible for circuit connection,said cable also having a stiffening core in its conduit. 1

In witness whereof, I hereunto subscribe my name this 29th day ofNovember- A. D.,

CHARLES L. LILLEBERG.

